CN110967889A

CN110967889A - Display panel

Info

Publication number: CN110967889A
Application number: CN201911335343.2A
Authority: CN
Inventors: 陈兴武
Original assignee: TCL China Star Optoelectronics Technology Co Ltd
Current assignee: TCL China Star Optoelectronics Technology Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-04-07
Also published as: US11442327B2; US20210405495A1; WO2021128483A1

Abstract

The embodiment of the application provides a display panel, which comprises a first substrate; the second substrate is opposite to the first substrate and comprises a substrate layer, a metal layer, a first protective layer, a nanoparticle layer and a second protective layer which are arranged in a stacked mode, and the second protective layer is located on one side, facing the first substrate, of the second substrate; the retaining wall is arranged between the first substrate and the second substrate, and a plurality of accommodating spaces are formed by the retaining wall, the first substrate and the second substrate in an enclosing manner; the electrophoresis material is contained in the containing space. According to the scheme, the penetration rate and the resolution of the display panel can be improved, and the display effect of the display panel is further improved.

Description

Display panel

Technical Field

The application relates to the technical field of display, in particular to a display panel.

Background

With the rapid development of display technology, the electrophoretic display device has advantages of lightness, thinness, durability, low power consumption, and the like, and is widely applied to the display fields of electronic tags, electronic billboards, wearable display devices, and the like.

Electrophoretic display devices are generally black and white displays, and in order to realize Color displays, methods such as Color filters (Color filters), Color dyes (Color dyes), Multi-particles (Multi-particles), and Color microcapsules (Color microcapsules) are generally used.

However, the above method not only has a complicated driving method, but also causes the transmittance and resolution of the display device to be reduced, thereby affecting the display effect of the display device.

Disclosure of Invention

The embodiment of the application provides a display panel, which can improve the display effect of the display panel.

An embodiment of the present application provides a display panel, including:

a first substrate;

the second substrate is opposite to the first substrate and comprises a substrate layer, a metal layer, a first protective layer, a nanoparticle layer and a second protective layer which are arranged in a stacked mode, and the second protective layer is located on one side, facing the first substrate, of the second substrate;

the retaining wall is arranged between the first substrate and the second substrate, and a plurality of accommodating spaces are formed by the retaining wall, the first substrate and the second substrate in an enclosing manner;

the electrophoresis material is contained in the containing space.

In the display panel provided by the embodiment of the application, the electrophoretic material includes an electrophoretic liquid and electrophoretic particles, and the electrophoretic particles are black charged particles.

In the display panel provided in the embodiment of the present application, the material of the retaining wall is a hydrophobic material, and the electrophoretic particles are particles whose surfaces have hydrophobicity; or

The material of barricade is hydrophilic material, electrophoresis granule is that the surface has hydrophilic granule.

In the display panel provided in the embodiment of the present application, the electrophoretic particles are configured to move toward the first substrate under the action of an electric field, so that the display panel is in a dark state; or the light-emitting diode is adsorbed on the retaining wall, so that the display panel is in a reflecting state.

In the display panel provided in the embodiment of the present application, the display panel further includes a first electrode and a second electrode, the first electrode is disposed on the first substrate, and the second electrode is disposed on the second substrate.

In the display panel provided in the embodiment of the present application, the first electrode is a transparent electrode, covers one side of the first substrate facing the second substrate, and is disposed between the retaining walls;

the second electrode is positioned at a corner formed by the second substrate and the retaining wall.

In the display panel provided in the embodiment of the present application, the first electrode is configured to apply a voltage with a polarity opposite to that of the electrophoretic particles to the electrophoretic particles, so that the electrophoretic particles move toward the first substrate to make the display panel in a dark state;

the second electrode is used for applying a voltage with a polarity opposite to that of the electrophoretic particles to the electrophoretic particles, so that the electrophoretic particles move towards a corner formed by the second substrate and the retaining wall, and the display panel is restored to a reflection state from a dark state.

In the display panel provided by the embodiment of the application, the nanoparticle layer includes metal nanoparticles distributed in an array.

In the display panel provided in the embodiment of the application, the accommodating space includes first accommodating space, second accommodating space or third accommodating space, is located interval between adjacent metal nanoparticles of first accommodating space is first interval, is located interval between adjacent metal nanoparticles of second accommodating space is the second interval, is located interval between adjacent metal nanoparticles of third accommodating space is the third interval, first interval with the second interval is inequality, first interval with the third interval is inequality, the second interval with the third interval is inequality.

In the display panel provided in the embodiment of the present application, the metal nanoparticles are configured to resonate with metal plasma in the metal layer to generate a structural color, so that the second substrate reflects visible light.

In summary, the display panel provided in the embodiment of the present application includes a first substrate; the second substrate is opposite to the first substrate and comprises a substrate layer, a metal layer, a first protective layer, a nanoparticle layer and a second protective layer which are arranged in a stacked mode, and the second protective layer is located on one side, facing the first substrate, of the second substrate; the retaining wall is arranged between the first substrate and the second substrate, and a plurality of accommodating spaces are formed by the retaining wall, the first substrate and the second substrate in an enclosing manner; the electrophoresis material is contained in the containing space. According to the scheme, the penetration rate and the resolution of the display panel can be improved, and the display effect of the display panel is further improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of a first structure of a display panel provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a second substrate of a display panel provided in an embodiment of the present application.

Fig. 3 is a top view of fig. 2 in the direction a-a' provided by an embodiment of the present application.

Fig. 4 is a second structural schematic diagram of the display panel provided in the embodiment of the present application.

Fig. 5 is a schematic diagram of a third structure of a display panel according to an embodiment of the present application.

Fig. 6 is a fourth structural schematic diagram of a display panel provided in the embodiment of the present application.

Fig. 7 is a fifth structural schematic diagram of a display panel provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Embodiments of the present application provide a display panel, which will be described in detail below.

Referring to fig. 1, fig. 1 is a schematic view of a first structure of a display panel according to an embodiment of the present disclosure. The display panel 100 may include a first substrate 10, a second substrate 20, a bank 30, and an electrophoretic material 40.

The first substrate 10 may be a flexible display substrate. The material of the first substrate 10 may include an organic flexible material such as Polyimide (PI).

Wherein the second substrate 20 is disposed opposite to the first substrate 10. In some embodiments, the second substrate 20 may include a substrate layer 21, a metal layer 22, a first protective layer 23, a nanoparticle layer 24, and a second protective layer 25, which may be stacked, as shown in fig. 2.

It should be noted that the terms "first", "second" and "third" in the description of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the described features.

It should be noted that in the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.

The substrate layer 21 may be a flexible substrate. The material of the substrate layer 21 may include an organic flexible material such as Polyimide (PI). The material of the metal layer 22 and the nanoparticle layer 24 may include a metal material such as magnesium, aluminum, molybdenum, copper, silver, titanium, or the like. The material of the first protective layer 23 and the second protective layer 25 may include aluminum oxide, silicon nitride, silicon oxide, or the like.

In some embodiments, as shown in fig. 3, the nanoparticle layer 24 may include several arrays of distributed metal nanoparticles 241. The size of the metal nanoparticles 241 may be 3 nm to 200 nm, and the distance between adjacent metal nanoparticles 241 may be 3 nm to 400 nm. The shape of the metal nanoparticles 241 may be square, rectangular, circular, or other shapes.

It should be noted that the metal plasma in the nanoparticle layer 24 may resonate with the metal plasma in the metal layer 22 to generate a structural color, so that the second substrate 20 may reflect visible light.

In some embodiments, the size of the metal nanoparticles 241 in the nanoparticle layer 24 and the distance between adjacent metal nanoparticles 241 may be adjusted accordingly, so that the second substrate 20 may reflect red, green, blue or other visible light.

The retaining wall 30 may be disposed between the first substrate 10 and the second substrate 20. The retaining wall 30 may surround the first substrate 10 and the second substrate 20 to form a plurality of receiving spaces 31. It should be noted that the material of the retaining wall 30 can be selected according to actual conditions. Such as a hydrophobic material or a hydrophilic material.

In some embodiments, the receiving space 31 may include a first receiving space 311, a second receiving space 312, or a third receiving space 313. The distance between adjacent metal nanoparticles 241 in the first receiving space 311 is a first distance, the distance between adjacent metal nanoparticles 241 in the second receiving space 312 is a second distance, and the distance between adjacent metal nanoparticles 241 in the third receiving space 313 is a third distance. It is understood that the first, second and third pitches are different from each other in order that the first, second and third receiving

spaces

311, 312 and 313 may reflect red, green or blue light, respectively. That is, the first pitch is different from the second pitch, the first pitch is different from the third pitch, and the second pitch is different from the third pitch. In some embodiments, the first accommodating space 311 may be a red light region, the second accommodating space 312 may be a green light region, and the third accommodating space 313 may be a blue light region.

The electrophoretic material 40 may be contained in the containing space 31. The electrophoretic material 40 may include electrophoretic particles 41 and an electrophoretic fluid 42. The electrophoretic material 40 may be an electronic ink. It will be appreciated that the electrophoretic particles 41 may be moved by an electric field.

Note that the electrophoretic particles 41 may be organic particles, inorganic particles, or colored microcapsule particles. The organic particles may include, among other things, polymer spheres and similar compound pigment particles. The inorganic particles may include silica, titania, or carbon black particles, and the like. The color microcapsule can be fish liver oil type particles coated with color solution. In the embodiment of the present application, the electrophoretic particles 41 are black charged particles.

In order to make the electrophoretic particles 41 adhere to the barriers 30 in the absence of an electric field, the display panel 100 is in a reflective state, and thus color display is achieved. In some embodiments, the electrophoretic particles 41 and the retaining walls 30 may be arranged accordingly. Specifically, when the material of the retaining wall 30 is a hydrophobic material, the surface of the electrophoretic particle 41 may be subjected to hydrophobic treatment, so that the electrophoretic particle 41 becomes a particle having a hydrophobic surface. Or when the material of the retaining wall 30 is a hydrophilic material, the surface of the electrophoretic particle 41 may be subjected to hydrophilic treatment, so that the electrophoretic particle 41 becomes a particle having a hydrophilic surface. It can be understood that, according to the principle of similar attraction, when the material of the retaining wall 30 and the surface of the electrophoretic particle 41 have the same property, the electrophoretic particle 41 will be adsorbed on the retaining wall 30 in the absence of an electric field, as shown in fig. 4.

It should be noted that, when an electric field exists, the electrophoretic particles 41 may move toward the first substrate 10 under the action of the electric field and finally move to the surface of the first substrate 10, and the incident light may be absorbed by the electrophoretic particles 41, so that the display panel 100 is in a dark state, as shown in fig. 5.

The display panel 100 further includes a first electrode 50 and a second electrode 60. Wherein, the first electrode 50 may be disposed on the first substrate 10. The second electrode 60 may be disposed on the second substrate 20.

It is understood that, when it is required to restore the display panel 100 from the dark state to the reflective state, the application of the voltage to the display panel 100 may be stopped, so that the electrophoretic particles 41 may move from the surface of the first substrate 10 toward the retaining wall 30 according to the principle of similar attraction, and finally adsorb on the retaining wall 30.

However, the speed of the display panel 100 returning from the dark state to the reflective state is slow only by the principle of similar attraction, which may result in a slow response speed of the display panel 100. In some embodiments, in order to speed up the restoration of the display panel 100 from the dark state to the reflective state, the first electrode 50 and the second electrode 60 may be processed accordingly.

Specifically, as shown in fig. 6 or fig. 7, the first electrode 50 may be a transparent electrode, and the first electrode 50 covers a side of the first substrate 10 facing the second substrate 20. It is understood that, in order to save the manufacturing cost, the first electrode 50 may be divided into a plurality of portions only for the portion of the first substrate 10 between the barriers 30 toward the side of the second substrate 20. That is, the first electrode 50 may be disposed between the barriers 30. Specifically, the second electrode 60 may be divided into a plurality of portions and disposed at a corner formed by the second substrate 20 and the retaining wall 30. It should be noted that, when the display panel 100 needs to be in the dark state, a voltage with a polarity opposite to that of the electrophoretic particles 41 may be applied to the first electrode 50, so that the electrophoretic particles 41 rapidly move toward the first substrate 10 and are adsorbed on the first substrate 10, as shown in fig. 6. The incident light may be absorbed by the electrophoretic particles 41, so that the display panel 100 is in a dark state. When it is required to restore the display panel 100 from the dark state to the reflective state, the application of the voltage to the first electrode 50 may be stopped, and the voltage with the polarity opposite to that of the electrophoretic particles 41 may be applied to the second electrode 60, so that the electrophoretic particles 41 rapidly move to the corner formed by the second substrate 20 and the retaining wall 30, and the incident light may reach the second substrate 20, so that the display panel 100 is in the reflective state, and the color display is implemented, as shown in fig. 7.

From the above, the display panel 100 provided in the embodiment of the present application may include the first substrate 10, the second substrate 20, the retaining wall 30, and the electrophoretic material 40. The second substrate 20 is arranged opposite to the first substrate 10, the second substrate 20 includes a substrate layer 21, a metal layer 22, a first protective layer 23, a nanoparticle layer 24, and a second protective layer 25, which are arranged in a stacked manner, and the second protective layer 25 is located on one side of the second substrate 20 facing the first substrate 10; the retaining wall 30 is disposed between the first substrate 10 and the second substrate 20, and the retaining wall 30, the first substrate 10 and the second substrate 20 enclose a plurality of accommodating spaces 31; the electrophoretic material 40 is accommodated in the accommodating space 31. According to the scheme, the metal plasma of the metal nanoparticles 241 in the nanoparticle layer 24 of the second substrate 20 and the metal plasma in the metal layer 22 can resonate to generate a structural color, so that incident light can be reflected to generate corresponding visible light after reaching the second substrate 20. The visible light can be directly emitted from the first substrate 10 without other processes, such as filtering, etc., so that the light consumption is reduced, and the light utilization rate of the display panel 100 is improved. Moreover, since the corresponding visible light can be directly reflected by the second substrate 20, color display can be achieved without color resistance or color ink filtering, that is, blocking of light is reduced, and light consumption is reduced, so that the transmittance of the display panel 100 and the resolution of the display panel 100 are improved, and the display effect of the display panel 100 is further improved.

The display panel provided by the embodiment of the present application is described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. A display panel, comprising:

a first substrate;

the electrophoresis material is contained in the containing space.

2. The display panel of claim 1, wherein the electrophoretic material comprises an electrophoretic fluid and electrophoretic particles, and the electrophoretic particles are black charged particles.

3. The display panel according to claim 2, wherein the material of the retaining wall is a hydrophobic material, and the electrophoretic particles are particles having a hydrophobic surface; or

4. The display panel of claim 3, wherein the electrophoretic particles are configured to move toward the first substrate under the action of the electric field, so that the display panel is in a dark state; or the light-emitting diode is adsorbed on the retaining wall, so that the display panel is in a reflecting state.

5. The display panel of claim 1, further comprising a first electrode disposed on the first substrate and a second electrode disposed on the second substrate.

6. The display panel according to claim 5, wherein the first electrode is a transparent electrode, covers a side of the first substrate facing the second substrate, and is disposed between the retaining walls;

7. The display panel of claim 6, wherein the first electrode is configured to apply a voltage to the electrophoretic particles with a polarity opposite to that of the electrophoretic particles, so that the electrophoretic particles move toward the first substrate to make the display panel in a dark state;

8. The display panel of claim 1, wherein the nanoparticle layer comprises an array of metallic nanoparticles.

9. The display panel according to claim 8, wherein the receiving spaces comprise a first receiving space, a second receiving space or a third receiving space, a first distance is defined as a distance between adjacent metal nanoparticles in the first receiving space, a second distance is defined as a distance between adjacent metal nanoparticles in the second receiving space, a third distance is defined as a distance between adjacent metal nanoparticles in the third receiving space, the first distance is different from the second distance, the first distance is different from the third distance, and the second distance is different from the third distance.

10. The display panel of claim 8, wherein the metal nanoparticles are configured to resonate with metal plasmons in the metal layer to generate a structural color such that the second substrate reflects visible light.